V4L/DVB (7489): videobuf-vmalloc.c: Remove buf_release from videobuf_vm_close

Remove the buf_release on vm_close because it will lead to a buffer being
released multiple times since all buffers are already freed under the two
possible cases: device close or STREAMOFF.
Signed-off-by: Brandon Philips <bphilips@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/videobuf-vmalloc.c

@@ -78,8 +78,6 @@ videobuf_vm_close(struct vm_area_struct *vma)
 			if (q->bufs[i]->map != map)
 				continue;
 
-			q->ops->buf_release(q,q->bufs[i]);
-
 			q->bufs[i]->map   = NULL;
 			q->bufs[i]->baddr = 0;
 		}